Best Thermostat Housing Caps of 2025

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Thermostat housing caps are essential components in any engine cooling system. These caps are designed to seal the thermostat housing, which is responsible for regulating the engine's operating temperature. The caps are typically made of high-quality materials such as aluminum or plastic, which provide durability and resistance to heat and pressure. They are available in different sizes and configurations to fit various types of engines and cooling systems. With their reliable sealing capabilities, thermostat housing caps help prevent coolant leaks and maintain engine performance. These caps are a vital component in keeping engines running smoothly and efficiently.
At a Glance: Our Top Picks
Top 10 Thermostat Housing Caps
URO Parts Thermostat Housing Cap
URO Parts Cap is a thermostat housing cap designed to fit perfectly, preventing coolant leaks. By replacing your old cap, you avoid potential leaks and keep your engine running smoothly. Its OE replacement design makes installation a breeze. Crafted from high-quality materials, it can withstand high heat and engine vibrations, ensuring durability. With a 24 Month Unlimited Mileage Warranty, you can trust in its longevity and performance.
A-Premium Engine Coolant Thermostat Housing
The A-Premium Thermostat Housing is designed to fit select Toyota models, ensuring compatibility and ease of installation. Its durable construction offers resistance to corrosion and heat, providing reliable performance for your vehicle. As a direct replacement for your original equipment, it simplifies the installation process, allowing you to get back on the road quickly. Additionally, you can confidently purchase this product, knowing it comes with a one-year unlimited-mileage guarantee, giving you peace of mind about your investment.
A-Premium Engine Coolant Thermostat Housing
The A-Premium Thermostat Housing is designed to fit various Chevrolet, GMC, Buick, Oldsmobile, and Pontiac models. This compatibility ensures that you can easily find the right part for your vehicle. It supports a wide range of models, from classic cars like the Chevrolet Corvette to modern SUVs. The product also includes reference numbers, making it simple for you to verify fitment before purchasing. This convenience helps prevent any mismatches, ensuring a smooth installation and optimal engine performance. With A-Premium's quality, you can trust that your vehicle will run efficiently.
MotoRad Thermostat Housing Cap for Toyota Avalon
The MotoRad Avalon Thermostat Cap is designed specifically for the 2014-2017 Toyota Avalon, ensuring a perfect fit for your vehicle. As a genuine MotoRad part, it guarantees high-quality performance and reliability. This product comes complete with original packaging and necessary hardware, making installation straightforward and hassle-free. Furthermore, it serves as a direct replacement for your existing thermostat housing cap, providing you with peace of mind knowing you’re using a dependable component. You can also easily confirm its compatibility with your vehicle through Amazon’s Confirmed Fit feature, ensuring you make the right choice.
MotoRad Coolant Thermostat Housing Cap for Toyota Camry 2014-2016
This MotoRad Thermostat Cap is designed for Toyota Camry models from 2014 to 2016. It is a genuine MotoRad part that comes with the original packaging and hardware, making it a direct replacement for your vehicle. By ensuring compatibility with your car, this cap offers you peace of mind when it comes to engine cooling. With its easy installation process, you can quickly replace your old cap without any hassle. The Amazon Confirmed Fit feature helps you confirm that this cap will fit your vehicle perfectly.
Thermostat Housing Cover for Mazda Miata
This thermostat housing cover is compatible with Mazda Miata models from 1994 to 1997 and 1999 to 2005. The cover is designed to fit properly, but it's important to review the description to ensure proper fit. It falls under the category of thermostat housing caps.
Gates Coolant Thermostat Housing Gasket for Mazda Miata
This Gates Coolant Thermostat Housing Gasket is a genuine Gates part that is designed specifically for Mazda Miata models from 1990 to 2004 with 1.6L and 1.8L L4 engines. It is a high-quality gasket that ensures a proper seal and prevents coolant leaks. The compatibility with a wide range of Mazda Miata models makes it a convenient choice for owners of these vehicles. By replacing the old gasket with this Gates part, you can maintain the optimal functioning of the thermostat housing, which is crucial for the engine's cooling system. With its reliable performance and easy installation, the Gates Coolant Thermostat Housing Gasket is a must-have for Mazda Miata owners.
Gates Coolant Thermostat Housing Gasket for Jeep Wrangler
This Gates Coolant Thermostat Housing Gasket is the perfect replacement part for your Jeep Wrangler. It is compatible with models from 1987 to 2006, making it a versatile option for a wide range of years. The genuine Gates parts ensure high quality and durability. With this gasket, you can be confident in the performance of your engine's coolant system. It provides a tight seal, preventing any leaks or coolant loss. This gasket is designed to fit perfectly and is easy to install. It is a reliable and cost-effective solution to keep your Jeep Wrangler running smoothly.
JEEFHO Radiator Coolant Cap for BMW
The JEEFHO Radiator Cap is designed to enhance your BMW's cooling system. Its robust construction features high-quality ABS plastic and sealing rubber, ensuring durability against extreme temperatures. With a maximum pressure relief of 140KPa, this cap efficiently prevents leaks, keeping your engine safe and cool. It is compatible with several BMW models from 2006 to 2016, making it a versatile choice for many drivers. Remember to let your engine cool before removing the cap to avoid any risk of burns. Enjoy peace of mind with the product’s 12-month worry-free return policy.
Gates Thermostat Housing Gasket for Ford F-150
The Gates Thermostat Gasket is designed specifically for Ford F-150 models from 1997 to 2008 with a 4.2L V6 engine. As a genuine Gates product, it ensures quality and reliability, giving you peace of mind. The gasket comes with original packaging and necessary hardware, making installation straightforward and hassle-free. It's a direct replacement part, which means you won't need to make additional modifications. To ensure compatibility with your vehicle, you can confirm the fitment using Amazon's Confirmed Fit feature, further enhancing your shopping experience.
Frequently Asked Questions (FAQs)
1. What happens when the thermostat housing goes bad?
When the thermostat housing goes bad, the most common symptom is overheating. This can occur due to corrosion or aging, causing the thermostat to get stuck in a closed position. When this happens, the coolant cannot reach the radiator, resulting in engine overheating and potential severe damage.
2. Can you drive with a cracked thermostat housing?
Driving with a cracked thermostat housing depends on how the thermostat is broken. Most thermostats are designed to fail in an open position, but if it fails in a closed position, driving with a broken thermostat housing is not recommended. This can cause engine overheating and further complications.
3. Can a thermostat housing be repaired?
Thermostat housing repair or replacement is relatively easy and can be done by a mechanic in less than 20 minutes, unless there are additional problems with the car. It is important to inspect the housing for any signs of breakage, leaks, or damage and address it promptly.
4. Can a thermostat seal cause a leak?
While a failed or bad thermostat can cause vehicle overheating, a thermostat housing that is damaged is more likely to result in a coolant leak. This can be due to a failed seal in the engine or a warped housing. It is important to address any coolant leaks promptly to prevent engine damage.
5. Is thermostat housing leak serious?
A thermostat housing leak should not be ignored as it can lead to serious consequences. Ignoring a coolant leak can result in engine damage and potentially ruin your day. It is recommended to have a mechanic inspect your thermostat and replace any faulty parts to prevent further issues.
6. What causes a thermostat housing to crack?
If the thermostat housing is made of plastic (carbon fiber) and the temperature drops below the freezing point of the cooling system, the coolant can freeze and expand, causing the thermostat housing to crack.
7. Can you seal a thermostat housing leak?
If the leak is at the flange gasket, the housing can be removed, residual gasket material can be scraped off, and a new gasket with sealant can be applied. It is also recommended to replace the thermostat while the housing is off. If the housing is cracked, the same procedure can be followed with the installation of a new housing.
During our thermostat housing cap research, we found 24 thermostat housing cap products and shortlisted 10 quality products. We collected and analyzed 2,072 customer reviews through our big data system to write the thermostat housing caps list. We found that most customers choose thermostat housing caps with an average price of $15.94.
The thermostat housing caps are available for purchase. We have researched hundreds of brands and picked the top brands of thermostat housing caps, including URO Parts, A-Premium, Sixity Auto, Marketplace Auto Parts, JEEFHO. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.